Answer:
The best-known threat comes from human pressures, driven by agriculture, residential, and commercial expansion into cactus habitats. But the worst offender, the scientists were surprised to find, is the illegal trade of cactus plants and seeds, affecting 47 percent of the threatened species.
Covalent bond = a bond in which the electrons are shared by the partner atoms.
<span>Polar bond = simply a type of covalent bond in which the electrons are </span>
<span>shared but not equally. This happens when two different atoms come </span>
<span>together, such a C and O. Each atom has a different ability to draw </span>
<span>electrons to itself when it shares electrons (that drawing ability is </span>
<span>called Electronegativity). </span>
migratory bird is a bird that travels from one place to another at regular times often over long distances. ... Most native birdspecies (birds naturally occurring in the United States) belong to a protected family and are therefore protected by theMigratory Bird Treaty Act.
It would be maximum length because both parents are passing on those genes.
